Data from the WHO's sentinel surveillance system spread across 84 countries show that the percentage of people testing positive for the virus has been rising over the past few weeks. Overall, more than 10 percent tested positive. The ratio fluctuates by region. In Europe, the positive rate is more than 20%. The Americas, Europe and the Western Pacific are all seeing new waves of infections.

Recently, the positive rate of COVID-19 has been increasing globally, with increases in the Eastern Mediterranean, Europe and the Americas, and decreases in other regions. At present, JN.1, KP.2 and KP.3 are the main circulating strains in the world, and the variant strain LB.1 is listed as a variant strain under surveillance (VUM) by WHO.

Stroke, also known as cerebrovascular disease, is a sudden occurrence of cerebrovascular circulation disorders, mainly including ischemic stroke and hemorrhagic stroke.

Academician Zhong Nanshan said at the Biomedicine and Health sub-forum of the 2023 Greater Bay Area Science Forum that the forecast based on the seirs model shows that the peak of the second wave of the SARS-CoV-2 epidemic in 2023 will occur at the end of June, about 65 million per week.